Meaning of “hold on” - Learner’s Dictionary

hold on

informal phrasal verb with hold uk us /həʊld/ verb (past tense and past participle held)

B1 to wait:

Hold on! I'll just check my diary.

to hold something or someone firmly with your hands or arms:

Hold on tight!

(Definition of “hold on” from the Cambridge Learner’s Dictionary © Cambridge University Press)